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Komon

UCHIGUMORI

UCHIGUMORI

No.260213-Uchi-S1
¥150,000 JPY
¥150,000 JPY
Sale
Shipping calculated at checkout.

Available From: April 12, 2026 10:00 (JST)

AREA : Kyoto

MINE : -

LAYER : Uchigumori

REFERENCE GRIT : 4,000-6,000 Grit

SIZE : W 75mm, L 206mm, H 35.8mm

INTERPRETATION OF THE STONE

A fine uchigumori with strong polishing strength that is a bit on the harder side. Being on the harder finer side it can give a bright color to soft iron without blurring the details as some softer Uchigumori can do.

A versatile stone that cuts well on all carbon steel. Excelling as a polishing stone to reveal fine detail in Tamahagane, Watetsu as well as folded wrought iron. Tested on Tamahagane Honyaki, Tanaka sanmai, Watetsu, Hitachi Honyaki, wrought iron as well as Wootz.

I felt it is in between jito and Hato. as it reacts differently to harder or softer steels. Best used with very little water to bring up a fine mud from the stone. Ease of use is normal, the stone takes a bit of time to get used to but once understood it reveals many possibilities for polishing.

RECOMMENDED USE FOR :

Fine polishing for Tamahagane, soft iron, wrought iron, Honyaki and similar forging and steel types

MATERIAL
◻︎ Carbon Steel
◻︎ Tamahagane
◻︎ Wrought Iron
◻︎ Watetsu & Soft Iron Cladding
FORGING STYLE
◻︎ Honyaki
◻︎ Sanmai
◻︎ Damascus
BLADE TYPE
◻︎ Double Bevel Knife
◻︎ Single Bevel Knife
◻︎ Woodworking Tool
PROCESS
◻︎ Kasumi Finish (Polishing)
◻︎ Fine Detail Finish (Polishing)
◻︎ Edge Sharpening
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Prepared for Use

Komon does more than simply select workable natural stones.
Even the finest natural stone cannot be used for sharpening straight from the mountain. Each stone must be carefully prepared and finished before it is ready for use.

At Komon, each stone is carefully prepared and finished by craftsmen with extensive experience and knowledge of natural stones, so that its qualities can be experienced from the moment it is put to use.

  • A STABLE BASE

    We carefully flatten the back side to ensure stability during sharpening. When additional support is needed, we attach a wooden base to create a secure foundation.

    Any wobbling of the stone affects the precision of the sharpening process; stability is particularly crucial during final polishing and edge sharpening.

  • A READY-TO-SHARPEN SURFACE

    The sharpening surface is flattened and prepared for use.
    Softer stones intended for polishing and finishing are given generously rounded edges. Harder stones used for edge sharpening are also carefully rounded to prevent the stone from damaging the blade.

    As a natural stone is used, new layers of stone will gradually appear. Regular flattening and maintenance are therefore essential to keep the stone performing at its best.

  • PROTECTING THE STONE FOR YEARS TO COME

    Natural stones are formed by nature, and some may contain weaknesses that could eventually develop into cracks.
    We identify these stones in advance and, when necessary, reinforce the surrounding areas with cashew resin to help prevent future damage.

    Cashew resin can scratch a blade. Before use, any exposed cashew resin on the corner should be carefully rounded with a medium grit diamond plate.

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¥3,000 JPY
¥3,000 JPY
Sale Sold out
Shipping calculated at checkout.
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Diamond Stone for Professional Sharpeners

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